s7 turned itself off and will not turn on

[thomascolding]

Samsung galaxy s7 turned itself off and will not turn on
The batteries was charged 80% as it happend. I noticed that the screen lately began to freeze and the phone felt warm.
Before it turned off they was message about memory, did not remember the exact sentence.

I have already tried to hard reset without any success.
Anybody who have experiances sudden incident and will share the reason.

 

[Dngrsone]

Try turning it on while plugged in?

 

[B. Diddy]

Welcome to Android Central! Plug it into a wall outlet and let it charge for a good 6 hours or so. Then press and hold Power and Vol Down for about 20 seconds. If nothing happens, wait a few seconds, and then press and hold Power only for about 20 seconds. If nothing happens, then it's possible that either the battery or the motherboard has failed.